Improvement in padlocks



@wth-d see Lam Patent No. 103,043, daad May 17, 1870.

`nupnovmvraNT 1N PADLocKs.

To whom @t may concern Be it known that I, ELIAS 1?.-HALL, of Chicago,

in the county of Cook and` State of illinois, have invented a' new and useful Improvementin Pad- Locks v and I do declare that the following is a truc 4and accurate description thereof', reference being had tothe Vaccompanying drawings and to the letters of reference marked thereon and 4being a part of this specification, in which- Figure 1 is a plan ot' my lock, with Athe co\'cring-plate removed.- i

Figure 2' is au'ertical cross-section of the same on the line xaiin iig. l,

Figure 3 is a'bottoni plan -of the'key, also showing i thc tumbler-s in' section. y

Figu1e4 isa sectional plan, showing the position of the dog's when the. lock is opened.

FigureV 5 is'a section through the tumbler-wheels.

4Like letters indicate like parts in each ligure.

The nature ofv this invention relates teau improve# meut iuthe construction of padlocks, and v It consistsv First, in the construction and employ-'nient of a peculiarly -formed pair ot' tumbler-wheels, which `mesh with each other, `partly `through cogs and partly through sheets projecting from the periphery of one into corresponding recesses in the other, alternately, the rotation oi' said wheels being effected by pushing between them a dat key, provided with proper openings, through which thestuds in the wheels passrinto their sockets.

Seqondly, iu 'the construction and armngement ofits several operative p arts.V

A represeuts'the case' of my padlock, to which is pivoted the hasp B, in the usual manner.

In the periphery of the case, below the hinge of 4 the hasp, is a transverse slot, a, through which the key C enters the lock.

bl bare postsin -the Vvback plate of the lock, on wliichare journaled the tumbler-whecls D. The peripheries of these wheels are far enough apart to permit the key to pass between them.' g

On the periphery of each wheel are disposed at such intervals, and in such form ,as may be desired,

gear-studs c, letters, or even medallions, if desired,V

'those on each wheel projecting into sockets outhe 0pposite wheel, whenkboth are rotated simultaneously.

ylhis rotation of the wheels, is effected by pressing the end `ofthe key against astud, c', projecting from a attened surface on each wheel, in thev commencement, audvis continued by the meshing-of the wheels togetherby the studs and sockets described, the studs passing through openings d, properly disposed in the key, as shown in g. 3. i 1

Sectional cogs may be employed,`in lieu of the studs or pins described,`if preferred. l `vAcross the face4 of one of the wheels directly, as shown, or diagonally, if preferred, a cog or gear- .00th,

ffis formed, which `gears with' a corresponding rccess, f', in the face of the other wheel, the latter 'be- -ing, of course, enough larger to accommodate the thickness' of the key, which is corrugated Iat theV proper place, g, as shown in iig. 3.

A spiral spring, c, is secured to each of the posts b, and coiled about it, with one engaging with the interior of Ithe wheel sleeved over it, so that the wheels are rot-ated outward, ready for the reception of the key.'

Ordinary gears may be vconstructed on a projection from the vperiphery of one or both of the tumblcrewheels, or attached to them,v thus compelling a' simultaneous motion of both wheels, and, it'

necessary, dispensing with one of the coiled springs.

h is a post, ou which are `pivoted two or more tumblers, E, hooked at their upper ends, to engage with the opening in the' point .ofthe hasp, being thrown forward for that purpose h r the springs secured to their bases.

F is a' dog,- pivoted to the. hack of the cascatj, and has a transverse har or head, F', 'which is pressed down by the point of the hasp, when the latter ent-ers the lock, as .shown in iig. 1, but is thrown up by the spring A7a when the tumblers are -Withdrawn from the hasp, which movement of the dog ejects the hasp'from the lock,ras shown in fig.

.4, and,'u`ntil again pushed downward by the hasp entering the lock, the dog keeps the tumblers backuntll the hasp is down, .thus permitting the use of longer tumblers than could he used if they had to be forced 'back by the hasp.

The ltnmblers are each provided with a notch, nl., i in the edge nextthe tumblerwheels, which receiveA thc pressure of the end of the key.

It will `he noticed that the key mustherconstructc'd in its detailsto exactly accommodate the studs and cogs or the projections of the wheels, before it can commence rotating them, and that its end must press equally on cach tumbler, to withdraw it from the-hasp.

' The tumblers are u 'ot set on the same plane, but ,i

one back of the other, requiring a key to project at that point on its end which is opposite the tumbler farthest removed from it.

When the key is-withldrawn after unlocking, the hasp is again locked by pressing it down into the lock, its end forcing ythe dog down.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In the construction ofv locks, the tuniblerf wheelsv D,`pro'vided with studs, cogsrand recesses, or their equivalents, and the key C, provided with corresponding openings and corrngai'ions g, substantially i as andfor thc purpose set forth.

2. The arrangement of the tumbler-wheels D,

the tumble-rs E, the dog F, the springs tandlqand the hasp B, when constructed as described and-for the purpose set fort-h..

XVitnesscs:

Seite. B. BELL, D. M. HILLIs.

E. P; HALL,l 

